USDA Hardiness Zone 12a
Frost Dates for 96746 — Kapaa, Hawaii
NOAA 1991–2020 normals from Lihue WSO Airport 1020.1, HI (100 ft), 7 miles south.
Updated
No night at or below 32°F was recorded at Lihue WSO Airport 1020.1, HI in 1991–2020, not even 36°F, so Kapaa has no frost dates to plan around; the coolest month, January, averages a low of 66°F.
- Winters with a freeze
- 0%
- Winters with 36°F
- 0%
- Coldest month low
- 66°F
- Hardiness zone
- 12a
32°F or below, 1991–2020
frost possible on leaves
average, January
50 to 55°F (10.0 to 12.8°C) coldest night
- First snow
- Rare
- Last snow
- Rare
- Winters with snow
- 0%
- Snow per year
- 0"
median, 1991–2020
median, 1991–2020
0 of 18 observed
NOAA normal
Frost risk by date in Kapaa
Lihue WSO Airport 1020.1, HI, 7 miles south of Kapaa, did not record a night at or below 32°F in 1991–2020. 36 of the 37 other Hawaii stations behind this site's ZIP pages recorded no 32°F night either.
Freeze probabilities 1991–2020 at Lihue WSO Airport 1020.1, HI, from NOAA NCEI U.S. Climate Normals. Where a temperature is reached in fewer than 99.5% of years, the dates describe only the years that reach it. Not a forecast.
Frost risk on any date in 96746 →Compare Kapaa with another place →
Weather by month in Kapaa
August is the warmest month at Lihue WSO Airport 1020.1, HI, averaging 85°F by day and 75°F at night; February is the coldest at 78°F and 66°F. Not one month recorded a 32°F night; the lowest monthly average low is 66°F.
Warmth for growing adds up to 9,599 growing degree days a year (base 50°F), more than at 77% of the 35 Hawaii stations. 46% of them (4,425) have built up by the end of June, and August adds the most, 936. Precipitation totals 36.2 inches a year, most in March (5.6") and least in June (1.8"); May to September bring 28% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 79 | 66 | 2.8 | 0% | 0 | 691 |
| Feb | 78 | 66 | 3.6 | 0% | 0 | 620 |
| Mar | 79 | 67 | 5.6 | 0% | 0 | 710 |
| Apr | 80 | 70 | 2.0 | 0% | 0 | 740 |
| May | 82 | 71 | 2.2 | 0% | 0 | 814 |
| Jun | 83 | 73 | 1.8 | 0% | 0 | 851 |
| Jul | 85 | 75 | 1.8 | 0% | 0 | 918 |
| Aug | 85 | 75 | 2.3 | 0% | 0 | 936 |
| Sep | 85 | 75 | 2.2 | 0% | 0 | 902 |
| Oct | 84 | 74 | 3.3 | 0% | 0 | 891 |
| Nov | 81 | 71 | 4.0 | 0% | 0 | 788 |
| Dec | 79 | 69 | 4.6 | 0% | 0 | 739 |
Monthly normals 1991–2020 at Lihue WSO Airport 1020.1, HI (100 ft), NOAA NCEI. "32°F night": chance of at least one in the month. GDD: growing degree days, base 50°F.
Compared with the next station
The nearest other station, Kilauea 1134, HI, 10 miles north of Kapaa and 290 feet higher, has no 32°F night on record either, and a coolest-month low 3°F colder (63°F).
When it snows in Kapaa, Hawaii
Measurable snow is rare here: only 0 of 18 winters from 1991 to 2020 recorded 0.1 inch or more at Lihue WSO Airport 1020.1, HI, 6.5 miles away, so there is no typical first-snow date to plan around.
Where these figures come from
ZIP 96746 is 7 miles from Lihue WSO Airport 1020.1, HI, which stands at 100 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 96746 in zone 12a, the band where the coldest night of the year averaged 50 to 55°F (10.0 to 12.8°C) over 1991–2020; a zone describes winter lows, not frost dates.
Hardiness zone and temperature range: USDA Plant Hardiness Zone Map 2023 (USDA-ARS, Oregon State University), ZIP-code listing, unchanged. °C converted from °F by this site.
Thirty-year averages, not a forecast: check the forecast before planting out. How stations are matched and which pages are offered to search engines: methodology.